September weather forecast
Major Sales, Brazil

The first month of the spring, September, is still a hot month in Major Sales, Brazil, with an average temperature varying between 33.8°C (92.8°F) and 20.9°C (69.6°F).

Temperature

The transition into September reveals an average high-temperature of a still tropical 33.8°C (92.8°F), mirroring a close resemblance to August. Major Sales observes a distinct decrease from peak daytime temperatures, with an average low-temperature of 20.9°C (69.6°F) throughout the month of September.

Heat index

In September, the average heat index is estimated at a sweltering 38°C (100.4°F). Ensure heightened precautions, risk of heat cramps and heat exhaustion is significant. Sustained activity could provoke heatstroke.
Heat index readings emphasize conditions of light breezes and shaded spots. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', arises from combining readings of air temperature and relative moisture content. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
For the human body, perspiration is the go-to method to regulate temperature, using sweat's evaporation to dissipate warmth. Increased relative humidity interferes with body cooling by slowing the rate of evaporation, resulting in a slower body cooling rate and a heightened feeling of heat. When the body is unable to balance heat gain, its temperature elevates, which may induce thermal illnesses.

Humidity

The average relative humidity in September is 50%.

Rainfall

September is the month with the least rainfall. Rain falls for 2.7 days and accumulates 2mm (0.08") of precipitation.

Daylight

The average length of the day in September is 12h and 4min.
On the first day of September in Major Sales, sunrise is at 05:33 and sunset at 17:32. On the last day of the month, sunrise is at 05:18 and sunset at 17:27 -03.

Sunshine

September has the most sunshine of the year, with an average of 9.8h of sunshine.

UV index

The months with the highest UV index are January through March, August through December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: The UV index of 7 in September translates into these instructions:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.